Two things I keep an eye out for are the DR250S tranny and DR oil coolers. Since I built my bike I have only seen two oil coolers for sale, both were the Jagg unit. I bought and installed one and it works great.

This is the first factory oil cooler I've seen for sale. I think this came stock on the CA models. It should give better oil line routing than the Jagg unit. I think the price he is asking is real high (but like I said, it's the only one I've ever seen). I'm not buying this one, if someone else wants it, grab it.